Manufacture of enameled metal plates.



No. 709,530. Patented sept. 23, |902;

n. wissen. i MANUFACTURE UF ENAMELED METAL PLATES. (Application led Apr. 14, 1902.)

(No Model.)

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UNITE *raras artnr trier.

DANIEL WIESER, OE ZURICH, SWITZERLAND, ASSIGNOR TO II. SULZBACH d CO., OF ZURICH, SWITZERLAND, A FIRM.

MAN U FACTU RE O F ENAIV ELIED `l/l ETL PLA'IVES.

SPECIFICATION forming part of Letters Patent No. 709,530, dated September 23, 1902.

Application led April I4, 1902. Serial No. 102,943. (No specimens.) i

To al?, whom it 11i/ty concern,.-

Be it known that I, DANIEL WIESER, a eiti zen ofthe Republic of Switzerland, residing at Zurich, Switzerland, have invented newand 5 useful Improvements in the Manufacture of Enameled Metal Plates, of which the foiiowing is a specification.

The use of enameled metal plates as wallcoverings is already known, but hitherto they Io have been Wanting in the property or capability of being bent when required without4 the enameled colored surface receiving in- Jury.

Theimproved methodof manufacture here- I5 inafter described enables metal .plates for covering surfaces to be made which plates even when sharply bent. show no injury, so that sharp corners may be covered with the plates, and thus the corners may be quite free 2o from joins; but that my invention may be fully understood I will describe the same in detail, reference being had to the accompanying drawing, which shows a section of a metal plate treated in accordance with my process,` drawn to an enlarged scale.

The foundation material a of the plates is zincmthat is to say, a metal which does not rust. It must be rolled iine and smooth, so as to lie smoothly on the wall. These zinc 3o plates o. are coated with a mixture b of Zincwhite and oil-varnish, the plates being passed between a pair of rubber rollers, to which the color is fed in a similar manner to that in which ink is fed in printing, and the plates are then dried in an oven at about SOO centigrade. The plates thus prepared are then provided witha coating of a lacquer color c, somewhat freely rubbed down with grease, after which they are again dried at about 80 ceu- 4o tigrade. This second coating is then ground dull, and this is an essential point for the goed manufacture of the coated plate. This dull grinding is effected by means of very line pumice-stone powder, which, mixed with water, is applied on a wool pad. The dullground plates after this treatment may be printed with the pattern. For this object the pattern d in question is conveyed onto a lithographie stone and the treatment proceeds as usual in lithographie printing, except that 5o sheet-metal-stamping iiy-presses are employed on account of the greater pressure required. Permanent colors must of course be used. The plates are then again dried in an oven or stove at about SOo centigrade, and then the impressed picture is coated with greasy copal lacquer and linally again dried in a stove for about eight hours at about 80 cenligrade.`

Having now particularly described and as- 6o certained the nature oit' my said invention, I declare that what I claim is '1. The method of enameling metal plates consistingin coatingthe plates with a mixture of zinc-white and oil-varnish, then drying them,coatin g the plates thus dried with greasy lacquer color and again drying them, `then rubbing said plates with ne pumice-stone mixed with water, then printing them with permanent. colors. 7o

2. The method of manufacturing enameled metal plates consisting in coating ine and smooth rolled metal plates with a mixture of zinc-white and oil-Varnish, then drying them, coating the plates thus dried with greasy lacquer color and again drying them, then grinding them dull by means of ne pumicestone powder mixed with water, printing the dull-ground plates with permanent colors, drying the printed plates, then coating with 8o greasy copal lacquer and nally drying them.

In testimony whereof I have signed my name to this speciication in the presence of two subscribing witnesses.

DANIEL I/VIESER.

Witnesses:

C. A. DIETRroHs, A. LIEBERKNECHT. 

